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Dat Do edited beginproblem_a_You_a.tex
about 10 years ago
Commit id: ef3974b8e8ae84d703c9e6733bdd3b69a85dc971
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\end{problem}
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\textbf{Solution 1: }
(a) Since we are receiving one extra coupon for each consecutive day: $1 + 2 + \ldots + (k-1) + k$, the total coupons received for $k$ days can be represented as $\sum\limits_{i=1}^k i$ = $\frac{k(k+1)}{2}$
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Hint: By hand, find the smallest $c$ for which $n=c$ satisfies this inequality, and
then prove by induction that it holds for all $n \ge c$.
\end{problem}
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\textbf{Solution 2: }
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Base Case: For $n=3$ $2^3+3^3+4^3\leq5^3$